Towel holder



FIG. 1 is a top, front, left-side perspective view of a towel holder showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof, the bottom plan view being identical thereto;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a left side elevational view thereof, the right side elevational view being mirror symmetrical thereto. 

The ornamental design for a towel holder, as shown and described. 